../ dmsp_15_ephemeris_20180508.txt 22-Jun-2023 00:37 109543 dmsp_16_ephemeris_20180508.txt 22-Jun-2023 00:37 109591 dmsp_17_ephemeris_20180508.txt 22-Jun-2023 00:37 109679 dmsp_18_ephemeris_20180508.txt 22-Jun-2023 00:37 109617